Any good FDF tutorial?

Does any one know 开发者_运维百科of a good tutorial on how to fill a pdf document fields using the fdf file format? I could find some but mostly in php (which I don't know).

If it's in any of the following programming languages, that'll be great:

VB6 C# VB.NET Visual Foxpro

Thanks in advance,

EGB

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Nevermind! The FDF toolkit has several sample projects and documentation.

It can be downloaded from: http://www.adobe.com/devnet/acrobat/fdftoolkit.html